drivers/usb/misc/emi62.c

   1 /*
   2  * Emagic EMI 2|6 usb audio interface firmware loader.
   3  * Copyright (C) 2002
   4  *      Tapio Laxström (tapio.laxstrom@iptime.fi)
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License, as published by
   8  * the Free Software Foundation, version 2.
   9  *
  10  * $Id: emi62.c,v 1.15 2002/04/23 06:13:59 tapio Exp $
  11  */
  12 #include <linux/kernel.h>
  13 #include <linux/errno.h>
  14 #include <linux/slab.h>
  15 #include <linux/init.h>
  16 #include <linux/module.h>
  17 #include <linux/usb.h>
  18 #include <linux/delay.h>
  19
  20 #define MAX_INTEL_HEX_RECORD_LENGTH 16
  21 typedef struct _INTEL_HEX_RECORD
  22 {
  23         __u32   length;
  24         __u32   address;
  25         __u32   type;
  26         __u8    data[MAX_INTEL_HEX_RECORD_LENGTH];
  27 } INTEL_HEX_RECORD, *PINTEL_HEX_RECORD;
  28
  29 /* include firmware (variables)*/
  30
  31 /* FIXME: This is quick and dirty solution! */
  32 #define SPDIF   /* if you want SPDIF comment next line */
  33 //#undef SPDIF  /* if you want MIDI uncomment this line */
  34
  35 #ifdef SPDIF
  36 #  include "emi62_fw_s.h" /* spdif fw */
  37 #else
  38 #  include "emi62_fw_m.h" /* midi fw */
  39 #endif
  40
  41 #define EMI62_VENDOR_ID                 0x086a  /* Emagic Soft-und Hardware GmBH */
  42 #define EMI62_PRODUCT_ID                0x0110  /* EMI 6|2m without firmware */
  43
  44 #define ANCHOR_LOAD_INTERNAL    0xA0    /* Vendor specific request code for Anchor Upload/Download (This one is implemented in the core) */
  45 #define ANCHOR_LOAD_EXTERNAL    0xA3    /* This command is not implemented in the core. Requires firmware */
  46 #define ANCHOR_LOAD_FPGA        0xA5    /* This command is not implemented in the core. Requires firmware. Emagic extension */
  47 #define MAX_INTERNAL_ADDRESS    0x1B3F  /* This is the highest internal RAM address for the AN2131Q */
  48 #define CPUCS_REG               0x7F92  /* EZ-USB Control and Status Register.  Bit 0 controls 8051 reset */
  49 #define INTERNAL_RAM(address)   (address <= MAX_INTERNAL_ADDRESS)
  50
  51 static int emi62_writememory( struct usb_device *dev, int address, unsigned char *data, int length, __u8 bRequest);
  52 static int emi62_set_reset(struct usb_device *dev, unsigned char reset_bit);
  53 static int emi62_load_firmware (struct usb_device *dev);
  54 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id);
  55 static void emi62_disconnect(struct usb_interface *intf);
  56 static int __init emi62_init (void);
  57 static void __exit emi62_exit (void);
  58
  59
  60 /* thanks to drivers/usb/serial/keyspan_pda.c code */
  61 static int emi62_writememory (struct usb_device *dev, int address, unsigned char *data, int length, __u8 request)
  62 {
  63         int result;
  64         unsigned char *buffer =  kmalloc (length, GFP_KERNEL);
  65
  66         if (!buffer) {
  67                 err("emi62: kmalloc(%d) failed.", length);
  68                 return -ENOMEM;
  69         }
  70         memcpy (buffer, data, length);
  71         /* Note: usb_control_msg returns negative value on error or length of the
  72          *               data that was written! */
  73         result = usb_control_msg (dev, usb_sndctrlpipe(dev, 0), request, 0x40, address, 0, buffer, length, 300);
  74         kfree (buffer);
  75         return result;
  76 }
  77
  78 /* thanks to drivers/usb/serial/keyspan_pda.c code */
  79 static int emi62_set_reset (struct usb_device *dev, unsigned char reset_bit)
  80 {
  81         int response;
  82         info("%s - %d", __FUNCTION__, reset_bit);
  83
  84         response = emi62_writememory (dev, CPUCS_REG, &reset_bit, 1, 0xa0);
  85         if (response < 0) {
  86                 err("emi62: set_reset (%d) failed", reset_bit);
  87         }
  88         return response;
  89 }
  90
  91 #define FW_LOAD_SIZE            1023
  92
  93 static int emi62_load_firmware (struct usb_device *dev)
  94 {
  95         int err;
  96         int i;
  97         int pos = 0;    /* Position in hex record */
  98         __u32 addr;     /* Address to write */
  99         __u8 *buf;
 100
 101         dev_dbg(&dev->dev, "load_firmware\n");
 102         buf = kmalloc(FW_LOAD_SIZE, GFP_KERNEL);
 103         if (!buf) {
 104                 err( "%s - error loading firmware: error = %d", __FUNCTION__, -ENOMEM);
 105                 err = -ENOMEM;
 106                 goto wraperr;
 107         }
 108
 109         /* Assert reset (stop the CPU in the EMI) */
 110         err = emi62_set_reset(dev,1);
 111         if (err < 0) {
 112                 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 113                 goto wraperr;
 114         }
 115
 116         /* 1. We need to put the loader for the FPGA into the EZ-USB */
 117         for (i=0; g_emi62_loader[i].type == 0; i++) {
 118                 err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_loader[i].length, ANCHOR_LOAD_INTERNAL);
 119                 if (err < 0) {
 120                         err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 121                         goto wraperr;
 122                 }
 123         }
 124
 125         /* De-assert reset (let the CPU run) */
 126         err = emi62_set_reset(dev,0);
 127         msleep(250);    /* let device settle */
 128
 129         /* 2. We upload the FPGA firmware into the EMI
 130          * Note: collect up to 1023 (yes!) bytes and send them with
 131          * a single request. This is _much_ faster! */
 132         do {
 133                 i = 0;
 134                 addr = g_emi62bs[pos].address;
 135
 136                 /* intel hex records are terminated with type 0 element */
 137                 while ((g_emi62bs[pos].type == 0) && (i + g_emi62bs[pos].length < FW_LOAD_SIZE)) {
 138                         memcpy(buf + i, g_emi62bs[pos].data, g_emi62bs[pos].length);
 139                         i += g_emi62bs[pos].length;
 140                         pos++;
 141                 }
 142                 err = emi62_writememory(dev, addr, buf, i, ANCHOR_LOAD_FPGA);
 143                 if (err < 0) {
 144                         err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 145                         goto wraperr;
 146                 }
 147         } while (i > 0);
 148
 149         /* Assert reset (stop the CPU in the EMI) */
 150         err = emi62_set_reset(dev,1);
 151         if (err < 0) {
 152                 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 153                 goto wraperr;
 154         }
 155
 156         /* 3. We need to put the loader for the firmware into the EZ-USB (again...) */
 157         for (i=0; g_emi62_loader[i].type == 0; i++) {
 158                 err = emi62_writememory(dev, g_emi62_loader[i].address, g_emi62_loader[i].data, g_emi62_loader[i].length, ANCHOR_LOAD_INTERNAL);
 159                 if (err < 0) {
 160                         err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 161                         goto wraperr;
 162                 }
 163         }
 164
 165         /* De-assert reset (let the CPU run) */
 166         err = emi62_set_reset(dev,0);
 167         if (err < 0) {
 168                 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 169                 goto wraperr;
 170         }
 171         msleep(250);    /* let device settle */
 172
 173         /* 4. We put the part of the firmware that lies in the external RAM into the EZ-USB */
 174
 175 /* FIXME: quick and dirty ifdefs */
 176 #ifdef SPDIF
 177         for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
 178                 if (!INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
 179                         err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_EXTERNAL);
 180                         if (err < 0) {
 181                                 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 182                                 goto wraperr;
 183                         }
 184                 }
 185         }
 186 #else /* MIDI */
 187         for (i=0; g_HexMidiFw62[i].type == 0; i++) {
 188                 if (!INTERNAL_RAM(g_HexMidiFw62[i].address)) {
 189                         err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_EXTERNAL);
 190                         if (err < 0) {
 191                                 err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
 192                                 goto wraperr;
 193                                 return err;
 194                         }
 195                 }
 196         }
 197 #endif
 198         /* Assert reset (stop the CPU in the EMI) */
 199         err = emi62_set_reset(dev,1);
 200         if (err < 0) {
 201                 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 202                 goto wraperr;
 203         }
 204
 205 /* FIXME: quick and dirty ifdefs */
 206 #ifdef SPDIF
 207         for (i=0; g_HexSpdifFw62[i].type == 0; i++) {
 208                 if (INTERNAL_RAM(g_HexSpdifFw62[i].address)) {
 209                         err = emi62_writememory(dev, g_HexSpdifFw62[i].address, g_HexSpdifFw62[i].data, g_HexSpdifFw62[i].length, ANCHOR_LOAD_INTERNAL);
 210                         if (err < 0) {
 211                                 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 212                                 goto wraperr;
 213                         }
 214                 }
 215         }
 216 #else /* MIDI */
 217         for (i=0; g_HexMidiFw62[i].type == 0; i++) {
 218                 if (INTERNAL_RAM(g_HexMidiFw62[i].address)) {
 219                         err = emi62_writememory(dev, g_HexMidiFw62[i].address, g_HexMidiFw62[i].data, g_HexMidiFw62[i].length, ANCHOR_LOAD_INTERNAL);
 220                         if (err < 0) {
 221                                 err("%s - error loading firmware: error = %d\n", __FUNCTION__, err);
 222                                 goto wraperr;
 223                         }
 224                 }
 225         }
 226 #endif
 227
 228         /* De-assert reset (let the CPU run) */
 229         err = emi62_set_reset(dev,0);
 230         if (err < 0) {
 231                 err("%s - error loading firmware: error = %d", __FUNCTION__, err);
 232                 goto wraperr;
 233         }
 234         msleep(250);    /* let device settle */
 235
 236         kfree(buf);
 237
 238         /* return 1 to fail the driver inialization
 239          * and give real driver change to load */
 240         return 1;
 241
 242 wraperr:
 243         kfree(buf);
 244         dev_err(&dev->dev, "Error\n");
 245         return err;
 246 }
 247
 248 static __devinitdata struct usb_device_id id_table [] = {
 249         { USB_DEVICE(EMI62_VENDOR_ID, EMI62_PRODUCT_ID) },
 250         { }                                             /* Terminating entry */
 251 };
 252
 253 MODULE_DEVICE_TABLE (usb, id_table);
 254
 255 static int emi62_probe(struct usb_interface *intf, const struct usb_device_id *id)
 256 {
 257         struct usb_device *dev = interface_to_usbdev(intf);
 258         dev_dbg(&intf->dev, "emi62_probe\n");
 259
 260         info("%s start", __FUNCTION__);
 261
 262         emi62_load_firmware(dev);
 263
 264         /* do not return the driver context, let real audio driver do that */
 265         return -EIO;
 266 }
 267
 268 static void emi62_disconnect(struct usb_interface *intf)
 269 {
 270 }
 271
 272 static struct usb_driver emi62_driver = {
 273         .name           = "emi62 - firmware loader",
 274         .probe          = emi62_probe,
 275         .disconnect     = emi62_disconnect,
 276         .id_table       = id_table,
 277 };
 278
 279 static int __init emi62_init (void)
 280 {
 281         int retval;
 282         retval = usb_register (&emi62_driver);
 283         if (retval)
 284                 printk(KERN_ERR "adi-emi: registration failed\n");
 285         return retval;
 286 }
 287
 288 static void __exit emi62_exit (void)
 289 {
 290         usb_deregister (&emi62_driver);
 291 }
 292
 293 module_init(emi62_init);
 294 module_exit(emi62_exit);
 295
 296 MODULE_AUTHOR("tapio laxström");
 297 MODULE_DESCRIPTION("Emagic EMI 6|2m firmware loader.");
 298 MODULE_LICENSE("GPL");
 299
 300 /* vi:ai:syntax=c:sw=8:ts=8:tw=80
 301  */